Temporary directories ($TMPDIR)
See also:
In Linux the standard directory for temporary files is
/tmp. For many applications this can be changed by setting
the environment variable $TMPDIR. Specifying a
suitable TMPDIR is an important optimization for programs
that make a lot of scratch I/O.
On Hummel-2 directories for temporary files are automatically created
and at the end automatically deleted for every interactive session and
every batch job. The names of these directories are generated in the
Environment Module site/tmpdir and kept in these
environment variables:
| Variable | Explanation |
|---|---|
$TMPDIR |
This variable is always defined. |
$RRZ_GLOBAL_TMPDIR |
Scratch directory in
/beegfs. |
$RRZ_LOCAL_TMPDIR |
Exists for Hummel-1 compatibility. Is set
to /tmp. |
Module site/tmpdir is automatically loaded in
interactive session. In batch jobs it is loaded in:
source /sw/batch/init.[c]sh
Module site/tmpdir sets variable in the following
way:
| Environment | Settings |
| interactive session | TMPDIR=/beegfs/tmp/...RRZ_GLOBAL_TMPDIR=$TMPDIRRRZ_LOCAL_TMPDIR=$TMPDIR |
| batch job | RRZ_GLOBAL_TMPDIR=/beegfs/scratch/...RRZ_LOCAL_TMPDIR=/tmpTMPDIR=$RRZ_LOCAL_TMPDIR |
interaktive batch job (salloc)without source /sw/batch/init.[c]sh |
same as interactive session (variables are inherited) |
interaktive batch job (salloc)after source /sw/batch/init.[c]sh |
TMPDIR=/beegfs/tmp/... (taken from session)RRZ_GLOBAL_TMPDIR=$TMPDIRRRZ_LOCAL_TMPDIR=/tmp |